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arXiv · 0905.3425

Resolution to neutrino masses, baryon asymmetry in leptogenesis and cosmic-ray anomalies

Chuan-Hung Chen
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Abstract

By extending the lepton sector of standard model to include one sterile neutrino and two sets of new Higgs doublets and right-handed neutrinos, denoted by $(η_1, N_1, N_3)$ and $(η_2, N_2, N_4)$, with two $Z_2$ symmetries, the puzzles of neutrino masses, matter-antimatter asymmetry and cosmic-ray excess observed by Fermi-LAT and PAMELA can be resolved simultaneously. The characters of the model are: (a) neutrino masses arise from type-I and radiative seesaw mechanisms; (b) leptogenesis leading to baryon asymmetry at the energy scale of $O(1- 10\rm TeV)$ could be realized through soft $Z_2$ symmetry breaking effects; and (c) the conditions of small couplings for a long-lived dark matter could be achieved naturally through loop corrections due to the same soft symmetry breaking effects. The candidate for dark matter in leptophilic decays could fit the Fermi-LAT and PAMELA data well.

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Chuan-Hung Chen. 2009-05-21. Resolution to neutrino masses, baryon asymmetry in leptogenesis and cosmic-ray anomalies. https://arxiv.org/abs/0905.3425

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